Dell Inspiron 5520 laptop unable to connect to internet via Wifi

My Internet was working fine first couple of days but since past 4 days I am not able to connect to internet via Wifi (however there are other laptops i.e. HP and Dell) that are able to use the same Wifi to connect to internet but my brand new Dell us not able.

Can anyone please help me? I am not quite techie, only understand very basics of this whole laptop (hardware and softwares etc)

This could be because of a security update; the DNS (Domain Name System) settings may be corrupted. As the system was able to connect to the internet 4 days ago, you can try to run a ‘System restore’ to a known good date when the internet was last working and then perform the Windows update and the MacAfee update. Please use the link below, which explains how to perform a system restore in Windows 7.

For your information, System restore will not delete any personal data; however it will delete any programs, windows updates or any other updates that took place recently. For example, if you are selecting the restore point to be the 15th of August, any programs installed to date after the 15th will be removed.

Once the system restore is complete, please check the internet connectivity.

Please do run Windows 7 updates and MacAfee updates.

To update McAfee please right click on the icon and select ‘Update’ option.

In case you would like to update the Windows 7 as well please use the link provided below.

I got a dell 5520 with Windows 8 preloaded on it and I have the exact same problem. I can fix it by right clicking the WiFi icon in the lower right hand part of the screen, can clicking "Troubleshoot Problems" and it fixes it for another 10 minutes, but then it just happens again...this is getting annoying, I bet it's Windows 8 driver incompatibility issues.

OMG I am having the exact same issue, I only bought my laptop 2 weeks ago (around 5th August 2012 in Dubai, UAE) and I was able to connect to wifi and use internet until few only 4 or 5 days back it stopped working. It is connected with the wireless router, but not to the internet. There are other computers in the wireless network that have no problem connecting to the internet, so I know my router and DSL modem are functioning properly. When I run diagnostic (troubleshoot) it says Problem Found: "The DNS server isn't responding" I dont know what it means?

In "Network and Sharing Center" at the left bottom there are few options, I clicked on "Intel PROSet/Wireless Tools, a pop up windows opens and it has a "Diagnostics" section, there are few options, I clicked on Diagnostic and there is another pop window opens "Manual Diagnostic Tool" and it says "run tests" which i clicked and here are the results:

This could be because of a security update; the DNS (Domain Name System) settings may be corrupted. As the system was able to connect to the internet 4 days ago, you can try to run a ‘System restore’ to a known good date when the internet was last working and then perform the Windows update and the MacAfee update. Please use the link below, which explains how to perform a system restore in Windows 7.

For your information, System restore will not delete any personal data; however it will delete any programs, windows updates or any other updates that took place recently. For example, if you are selecting the restore point to be the 15th of August, any programs installed to date after the 15th will be removed.

Once the system restore is complete, please check the internet connectivity.

Please do run Windows 7 updates and MacAfee updates.

To update McAfee please right click on the icon and select ‘Update’ option.

In case you would like to update the Windows 7 as well please use the link provided below.

Thanks for the valued information and feed back. I did try the step you told me i.e. system restore. to a automatic restore point something and a recommended date (recommended in that box that appeared in system restore) it was August 19, 2012. and after restarting my laptop the internet has started to work (via wifi since i only tried wifi so far) and I am really happy about it. And really really appreciate your help.

I now just have updated McAfee as you mentioned and now will be updating windows 7 too in a minute. and I hope after these updates my internet will continue to work :)

Have only DELL machines in the office and only having trouble finding decent wireless connectivity with the two 5520s I purchased recently. The rest work fine.

I virtually have to be on top of a wireless AP to connect with them.

here is an image of DELL inspiron 5520 (left) running next to older DELL inspiron 5110 (right). both machines running the same version of Metageek inssider to monitor wireless strength at the same location. (approx. 12m from wireless AP).

5110 (right) shows full signal on wireless icon and -50dBm on inssider while 5520 shows one or two bars on the wireless icon and -80dBm on inssider (and does not pick up the second wireless AP at all).

.

Have tried all suggestions above and contacted DELL support. they will be sending out an engineer to investigate.

i have new laptop dell 5520 the wifi for network is cutting after 10 menutes and give me massege the access limited and i returned back to conecting and after 10 menutes the wifi cutting but when conecting the modem cable the internet working probably

I got a dell 5520 with Windows 8 preloaded on it and I have the exact same problem. I can fix it by right clicking the WiFi icon in the lower right hand part of the screen, can clicking "Troubleshoot Problems" and it fixes it for another 10 minutes, but then it just happens again...this is getting annoying, I bet it's Windows 8 driver incompatibility issues.

DELL sent out an engineer (after taking 2 weeks to source replacement wireless cards). The DELL wireless cards were replaced with intel cards (according to engineer the same card running on the 5110 in the picture above) - with no improvement.

Engineer suspected that the 5520 wireless aerial (located behind the screen) is poor/defective. unfortunately, there are no spare parts in my part of the world to fix this within the next month or so...

I am now making arrangements with DELL to send the machines back for a refund.